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(1/2)*(x+2/3) = 5/4 // - 5/4
(1/2)*(x+2/3)-(5/4) = 0
(1/2)*(x+2/3)-5/4 = 0
1/2*(x+2/3)-5/4 = 0
(1/2*4*(x+2/3))/4-5/4 = 0
1/2*4*(x+2/3)-5 = 0
2*x-11/3 = 0
(2*x-11/3)/4 = 0
(2*x-11/3)/4 = 0 // * 4
2*x-11/3 = 0
2*x-11/3 = 0 // + 11/3
2*x = 11/3 // : 2
x = 11/3/2
x = 11/6
x = 11/6
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